"""System settings model — singleton company master data per tenant."""

from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Index, Integer, String
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin


class SystemSettings(Base, TenantMixin):
    """Singleton system settings per tenant — company master data for invoices/quotes."""

    __tablename__ = "system_settings"
    __table_args__ = (
        Index("ix_system_settings_tenant", "tenant_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    company_name: Mapped[str] = mapped_column(String(200), nullable=False)
    company_legal_form: Mapped[str | None] = mapped_column(String(50), nullable=True)
    company_street: Mapped[str] = mapped_column(String(255), nullable=False)
    company_city: Mapped[str] = mapped_column(String(100), nullable=False)
    company_zip: Mapped[str] = mapped_column(String(20), nullable=False)
    company_country: Mapped[str] = mapped_column(String(2), nullable=False)
    tax_number: Mapped[str | None] = mapped_column(String(50), nullable=True)
    vat_id: Mapped[str | None] = mapped_column(String(50), nullable=True)
    iban: Mapped[str | None] = mapped_column(String(34), nullable=True)
    bic: Mapped[str | None] = mapped_column(String(11), nullable=True)
    bank_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
    ceo: Mapped[str | None] = mapped_column(String(100), nullable=True)
    trade_register: Mapped[str | None] = mapped_column(String(100), nullable=True)
    default_currency_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("currencies.id", ondelete="SET NULL"), nullable=True
    )
    default_tax_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("tax_rates.id", ondelete="SET NULL"), nullable=True
    )
    invoice_prefix: Mapped[str] = mapped_column(String(20), nullable=False, default="RE-")
    quote_prefix: Mapped[str] = mapped_column(String(20), nullable=False, default="AN-")
    payment_terms_days: Mapped[int] = mapped_column(Integer, nullable=False, default=14)
    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)